1. Make sure he can't see through the fence
2. Make it secure at the bottom to discourage digging
3. There needs to be a section of permanent shade
4. A hiding place in the shade so it's always cool inside
5. sink a receptacle into the ground for water
6. A flat piece of cement or a large tile to feed off of
7. edible plants, grasses and weeds
8. tall enough walls that he can't climb out
9. cap the corners